WO2010122620A1 - Appareil de reproduction d'image et procédé de reproduction d'image - Google Patents

Appareil de reproduction d'image et procédé de reproduction d'image Download PDF

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Publication number
WO2010122620A1
WO2010122620A1 PCT/JP2009/006669 JP2009006669W WO2010122620A1 WO 2010122620 A1 WO2010122620 A1 WO 2010122620A1 JP 2009006669 W JP2009006669 W JP 2009006669W WO 2010122620 A1 WO2010122620 A1 WO 2010122620A1
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WIPO (PCT)
Prior art keywords
unit
data
image
error
compressed data
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PCT/JP2009/006669
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English (en)
Japanese (ja)
Inventor
荒川賢治
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パナソニック株式会社
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Application filed by パナソニック株式会社 filed Critical パナソニック株式会社
Publication of WO2010122620A1 publication Critical patent/WO2010122620A1/fr
Priority to US13/274,578 priority Critical patent/US8666187B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/85—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression
    • H04N19/89—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression involving methods or arrangements for detection of transmission errors at the decoder
    • H04N19/895—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression involving methods or arrangements for detection of transmission errors at the decoder in combination with error concealment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/78—Television signal recording using magnetic recording
    • H04N5/781—Television signal recording using magnetic recording on disks or drums
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N9/804—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components
    • H04N9/8042—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components involving data reduction

Definitions

  • the present invention relates to an image reproducing device and an image reproducing method, and more particularly, to an image reproducing device and an image reproducing method for reading compressed image data from a recording medium and expanding the read image data.
  • Patent Document 1 discloses a technique for partially reading and expanding a necessary part of code data (hereinafter also referred to as compressed data) recorded on a recording medium.
  • an RST marker is detected from compressed data including a restart marker code (hereinafter also referred to as an RST marker), and the compressed data is expanded using the position of the detected RST marker as an expansion start position. To do. Thereby, in the technique described in Patent Document 1, only a part of the compressed data can be expanded, so that necessary data can be processed at a higher speed.
  • a restart marker code hereinafter also referred to as an RST marker
  • the RST marker is a code indicating a position for returning the expansion process when an error occurs in the expansion process.
  • a technique for performing decompression restoration processing using an RST marker is disclosed in Patent Document 2, for example.
  • errors include a code error that occurs when the code data recorded on the recording medium itself is incorrect, and a transfer error that occurs when the code data is read from the recording medium.
  • the compressed data is simply decompressed from the next RST marker and the decompressed data is output.
  • an object of the present invention is to provide an image reproducing apparatus and an image reproducing method capable of flexibly controlling the processing of the decompressed data obtained when an error occurs and dealing with the generated error.
  • an image reproducing apparatus is an image reproducing apparatus that decompresses and outputs compressed data, which is compressed image data, and outputs the compressed data from a recording medium in a predetermined processing unit.
  • a reproduction unit that reads out unit compressed data for each time, and a decompression unit that generates unit decompression data that is image data for each of the decompressed processing units by decompressing the unit compressed data read by the reproduction unit.
  • An output unit that outputs decompressed data including unit decompressed data generated by the decompressing unit, and an error management unit that detects an error generated by at least one of the reproducing unit and the decompressing unit for each unit compressed data;
  • a controller that determines whether or not to output the decompressed data when the error is detected, and the decompression data is detected when the error is detected.
  • Output by the control unit the control unit complements unit expanded data corresponding to the unit compressed data in which the error is detected with predetermined supplemental image data, and the output unit The decompressed data including the complementary image data is output.
  • the user can confirm the image data even a little by outputting the image data when it is determined to output the image data. Therefore, it is possible to confirm what kind of image data is to be reproduced as compared with the case where no image is displayed. Conversely, if it is determined that no image data is output when an error occurs, the image data is not output, so that the user does not need to check incomplete image data due to the occurrence of the error. Only normal image data can be confirmed. In this way, by adaptively changing the processing when an error occurs, the processing of the image data when an error is detected can be flexibly controlled and the generated error can be dealt with.
  • the image reproduction device further includes an input unit that acquires a first user instruction indicating whether or not to output the decompressed data when the error is detected, and the control unit includes the first user. According to the instruction, it may be determined whether or not to output the decompressed data when the error is detected.
  • the image reproduction apparatus further includes a data buffer management unit that has at least one buffer and stores unit compressed data read by the reproduction unit in the buffer, and the reproduction unit includes the recording medium
  • the unit compressed data read from is transferred to the data buffer management unit, and the decompression unit reads the unit compressed data stored in the buffer and decompresses the read unit compressed data to generate the unit decompressed data.
  • the error management unit reads from the buffer by the transfer error management unit that detects a transfer error that occurs when the unit compressed data is transferred from the recording medium to the data buffer management unit, and the decompression unit.
  • a code error management unit that detects a code error of the unit compressed data.
  • the reproducing unit reads the same unit compressed data, which is compressed data of the same processing unit as the unit compressed data in which the transfer error is detected, from the recording medium. It may be read again.
  • the transfer error management unit When the transfer error is detected, the transfer error management unit counts the number of transfer errors, compares the counted number with a predetermined threshold, notifies the control unit of the comparison result, and The unit repeats the reproduction unit to re-read the same unit compressed data until the counted number exceeds the threshold based on the comparison result, and outputs the decompressed data when the error is detected Then, when it is determined, and the number of counted times exceeds the threshold value, or a code error is detected by the code error management unit, it corresponds to the unit compressed data in which the error is detected.
  • Unit decompression data may be supplemented to the supplemental image data.
  • the input unit further acquires a second user instruction indicating the threshold value, and the control unit performs the same operation as the reproduction unit until the counted number exceeds the threshold value indicated by the second user instruction.
  • the rereading of the unit compressed data may be repeated.
  • the playback unit reads the unit compressed data from the recording medium by accessing the recording medium at a first access frequency
  • a transfer error is detected in the unit compressed data by the transfer error management unit
  • the same unit compressed data may be read by accessing the recording medium at a second access frequency lower than the first access frequency.
  • the access frequency to the recording medium can be lowered at the time of re-transfer, the possibility that the unit compressed data can be transferred normally can be increased.
  • control unit may record a recording medium when an error occurs in at least two unit compressed data included in the compressed data indicating one frame, or when an error occurs in the compressed data indicating at least two frames. Recording medium defective image data indicating that the recording medium is defective, and the output unit may output the recording medium defective image data.
  • control unit determines to output the decompressed data when the error is detected
  • unit control data corresponding to the unit compressed data in which the error is detected is converted into single color image data, Or you may complement using the image data around the image area corresponding to the said unit expansion data.
  • image data similar to normal image data can be output even a little.
  • image data similar to more normal image data can be output by generating a predicted image of the missing image region using image data around the missing image region.
  • the input unit obtains a third user instruction indicating whether to decompress unit compressed data after the unit compressed data in which the error is detected, and the control unit According to the third user instruction, when the error is detected, it may be determined whether to decompress the unit compressed data after the unit compressed data in which the error is detected.
  • the compressed data includes an application marker segment
  • the decompression unit further detects the application marker segment, and when the error is detected in the unit compressed data included in the application marker segment, the application data
  • the unit compressed data after the unit compressed data not included in the marker segment may be expanded.
  • image data not included in the application marker segment (hereinafter referred to as APP marker) can be expanded, image data to be output can be generated. This is because the data is added to the data of the image main body, and therefore the data of the image main body can be expanded even when an error occurs in the unit compressed data included in the APP marker.
  • the compressed data includes a restart marker code
  • the decompression unit further detects the restart marker code, and when the error is detected, the compressed data of the processing unit in which the error is detected.
  • the compressed data after the restart marker code included thereafter may be decompressed.
  • the control unit determines predetermined specific image data for complementing image data after the specific data detected when predetermined specific data is detected, and the decompression unit further includes the When the specific data is detected and the specific data is detected in the Huffman code area of the compressed data, the image data after the detected specific data may be complemented with the specific image data determined by the control unit.
  • the specific data embedded in the compressed data can be detected and replaced with the specific image data, so that the user can confirm the image data that has been partially expanded.
  • the image reproduction device further includes a storage unit, an image acquisition unit that acquires moving image data including a plurality of frames at a first frame rate, and stores the moving image data in the storage unit.
  • the moving image data is read out, and the read moving image data is compressed at the second frame rate to generate the compressed data, and the compressed data generated by the compressing unit is recorded on the recording medium.
  • the control unit further compares the first frame rate with the second frame rate, and if the first frame rate is faster than the second frame rate, the control unit performs a predetermined process by the compression unit.
  • the compression unit converts the specific data into the Huffman code. It may be embedded in the region.
  • the compression process cannot be performed in time, and therefore, within a possible range for one frame of image data.
  • a large amount of image data can be compressed by embedding specific data after performing compression processing. Therefore, compared with the case where the image data for one frame is not compressed, the user can check the acquired image data even in a part.
  • the image reproduction device may further include a display unit that displays the decompressed data output by the output unit.
  • the present invention can be realized not only as an image reproducing apparatus but also as a method using a processing unit constituting the image reproducing apparatus as a step.
  • FIG. 1 is a block diagram illustrating an example of the configuration of the image reproduction apparatus according to the first embodiment.
  • FIG. 2 is an operation conceptual diagram of the image reproduction apparatus according to the first embodiment when no error occurs.
  • FIG. 3 is a conceptual diagram of the operation of the image reproducing apparatus according to the first embodiment in a case where image data partially missing when a transfer error occurs is not displayed.
  • FIG. 4 is a conceptual diagram of the operation of the image reproducing apparatus according to the first embodiment in the case where partially missing image data is displayed when a transfer error occurs.
  • FIG. 5 is a conceptual diagram of the operation of the image reproduction apparatus according to the first embodiment when a transfer error occurs during reading of the APP marker.
  • FIG. 1 is a block diagram illustrating an example of the configuration of the image reproduction apparatus according to the first embodiment.
  • FIG. 2 is an operation conceptual diagram of the image reproduction apparatus according to the first embodiment when no error occurs.
  • FIG. 3 is a conceptual diagram of the operation of the image reproducing apparatus according to the first embodiment in a case where
  • FIG. 6 is a conceptual diagram of the operation of the image reproduction apparatus according to the first embodiment when decompressing partially compressed data.
  • FIG. 7 is a conceptual diagram of a partial compressed data complementing process at the time of moving image decompression.
  • FIG. 8 is a conceptual diagram of the complement processing when an error occurs in the compressed data in which the RST marker is inserted.
  • FIG. 9 is a flowchart showing decompression processing of the image reproduction apparatus according to the first embodiment.
  • FIG. 10 is a flowchart showing transfer error processing of the image reproduction apparatus according to the first embodiment.
  • FIG. 11 is a flowchart showing a code error process of the image reproduction apparatus according to the first embodiment.
  • FIG. 12 is a flowchart showing error image display processing of the image reproduction apparatus according to the first embodiment.
  • FIG. 13 is a flowchart illustrating a complementing process of the image reproduction device according to the first embodiment.
  • FIG. 14 is a flowchart showing recording medium determination processing of the image reproduction apparatus according to the first embodiment.
  • FIG. 15 is a block diagram illustrating an example of the configuration of the image recording apparatus according to the second embodiment.
  • FIG. 16 is an operation conceptual diagram of the image recording apparatus according to the second embodiment.
  • FIG. 17 is a flowchart illustrating compression processing of the image recording apparatus according to the second embodiment.
  • FIG. 18 is a block diagram illustrating an example of a different configuration of the image reproduction device according to the embodiment of the present invention.
  • the image reproducing apparatus is an image reproducing apparatus that reads compressed image data recorded on a recording medium in a predetermined processing unit, and decompresses and outputs the read compressed image data.
  • the image reproduction apparatus determines whether or not an error has occurred in the read compressed image data, and outputs an image data in which a part of the image is lost due to the error when the error has occurred. It is characterized by determining whether or not.
  • the configuration of the image reproduction apparatus 100 according to the first embodiment will be described with reference to FIG.
  • FIG. 1 is a block diagram illustrating an example of the configuration of the image reproduction device 100 according to the first embodiment.
  • the image playback apparatus 100 includes a playback unit 110, a data buffer management unit 120, a decompression unit 130, a storage unit 140, an error management unit 150, a control unit 160, and an input unit 170.
  • the display processing unit 180 and the monitor 190 are provided.
  • the image reproduction device 100 reads compressed data from a recording medium 200 such as an SD card or HDD (Hard Disk Drive), and displays an image generated by expanding the read compressed data on the monitor 190.
  • the recording medium 200 records compressed data generated by compressing image data based on an encoding standard such as JPEG or MPEG.
  • the reproduction unit 110 is a reading unit that reads compressed data from the recording medium 200 as unit compressed data for each predetermined processing unit.
  • the playback unit 110 reads the compressed data in units of sectors, which is the minimum read unit of the recording medium 200, and transfers the read compressed data in units of sectors to the data buffer management unit 120.
  • the playback unit 110 reads again from the recording medium 200 the same unit compressed data that is compressed data in the same processing unit as the unit compressed data in which the error has occurred.
  • the playback unit 110 reads the compressed data by accessing the recording medium 200 at a predetermined access frequency.
  • the playback unit 110 can change the access frequency under the control of the control unit 160.
  • the playback unit 110 normally reads the unit compressed data by accessing the recording medium 200 at the first access frequency, and reads the unit compressed data at the second access frequency lower than the first access frequency when performing re-reading. The same unit compressed data is read by accessing.
  • the data buffer management unit 120 has at least one data buffer, and stores the unit compressed data read by the reproduction unit 110 in the data buffer.
  • the data buffer management unit 120 has two sector buffers 121 and 122, and the compressed data transferred from the reproduction unit 110 is alternately transferred to the sector buffers 121 and 122 in units of sectors. To store.
  • the sector buffers 121 and 122 are storage units capable of storing compressed data having a data amount for at least one sector.
  • the data buffer management unit 120 may have three or more sector buffers.
  • the sector buffers 121 and 122 may be physically different buffer memories, or may be physically one buffer memory that is logically divided into regions.
  • the decompressing unit 130 decompresses the unit compressed data read by the reproducing unit 110, thereby generating unit decompressed data that is image data for each decompressed processing unit. Specifically, the decompressing unit 130 reads the compressed data stored in the sector buffers 121 and 122 in units of sectors, and decompresses the read compressed data in units of sectors. The decompressing unit 130 stores the decompressed data in units of sectors generated by decompressing the compressed data in units of sectors in the storage unit 140.
  • the storage unit 140 is a memory that stores decompressed data.
  • the storage unit 140 can store image data for at least one frame. Therefore, the storage unit 140 stores the decompressed data that is image data for one frame by accumulating the unit decompressed data generated by the decompressing unit 130.
  • the error management unit 150 detects an error generated by at least one of the reproduction unit 110 and the decompression unit 130 for each unit compressed data. Specifically, the error management unit 150 determines whether or not an error has occurred during the processing performed by each of the reproduction unit 110 and the decompression unit 130 on a sector basis. If the error management unit 150 determines that an error has occurred, the error management unit 150 notifies the control unit 160 that an error has been detected. As a specific configuration, as illustrated in FIG. 1, the error management unit 150 includes a transfer error management unit 151 and a code error management unit 152.
  • the transfer error management unit 151 detects a transfer error that occurs when the unit compressed data is transferred from the recording medium 200 to the data buffer management unit 120. That is, the transfer error management unit 151 detects a transfer error that occurs during transfer by the playback unit 110. For example, the transfer error management unit 151 determines whether a transfer error has occurred using ECC (Error Correction Code) or the like.
  • ECC Error Correction Code
  • the transfer error management unit 151 counts the number of transfer errors that is the number of times a transfer error is detected. Further, the transfer error management unit 151 compares the counted number of transfer errors with a predetermined threshold value, and notifies the control unit 160 of the comparison result. In other words, the transfer error management unit 151 determines whether the number of transfer errors exceeds a predetermined threshold and notifies the control unit 160 of the determination result.
  • the threshold value at this time is the number of times determined by the control unit 160, for example, a specific number of times that is a predetermined default number, or a user-specified number of times indicated by a user instruction input from the input unit 170 It is.
  • the code error management unit 152 detects a code error in the unit compressed data read from the sector buffers 121 and 122 by the decompression unit 130. For example, if the Huffman code area indicating the data of the image body in the compressed data includes a header or data that cannot appear (eg, FFFF, etc.), the code error management unit 152 sets the code error Is detected.
  • the control unit 160 controls the processing of the entire image reproduction device 100 by notifying each processing unit included in the image reproduction device 100 of an instruction. For example, the control unit 160 notifies the user instructions acquired by the input unit 170 to each processing unit. Details of specific instructions will be described later with reference to FIGS.
  • control unit 160 determines whether or not to display the decompressed data on the monitor 190 when an error (transfer error or code error) is detected by the error management unit 150. When it is determined that the decompressed data is to be displayed on the monitor 190, the control unit 160 supplements the unit decompressed data corresponding to the unit compressed data in which the error is detected with predetermined supplemental image data.
  • control unit 160 supplements the image area missing due to the error with the supplemental image data.
  • the complementary image data is, for example, image data around the missing image region, other image data, or image data of a specific single color.
  • the control unit 160 When it is determined not to display the decompressed data on the monitor 190, the control unit 160 generates non-expandable display image data indicating that an error has occurred and causes the monitor 190 to display it.
  • control unit 160 determines whether the recording medium is good or bad according to the number of errors that have occurred and the location where the error has occurred. Specifically, the controller 160 generates an error in at least two different unit compressed data included in the compressed data indicating one frame, or an error occurs in the compressed data indicating at least two different frames. In this case, recording medium defect image data indicating that the recording medium is defective is generated.
  • the input unit 170 is a user interface that acquires a user instruction from a user and transmits the acquired user instruction to the control unit 160. For example, when an error is detected, a first user instruction indicating whether or not to output image data obtained by decompressing the compressed data, a designated number of retransfers (retry times) when a transfer error is detected, that is, The input unit 170 acquires a second user instruction indicating a threshold value, a third user instruction indicating whether or not to decompress the compressed data after the location where the error is detected, and the like when an error is detected.
  • the display processing unit 180 is an example of an output unit that outputs decompressed data including unit decompressed data generated by the decompressing unit 130. Specifically, as illustrated in FIG. 1, the display processing unit 180 reads image data from the storage unit 140 and causes the monitor 190 to display the image data.
  • the monitor 190 is a display unit that displays image data such as an LCD (Liquid Crystal Display), an organic EL (Electro-Luminescence) display, a cathode ray tube, and a PDP (Plasma Display Panel).
  • LCD Liquid Crystal Display
  • organic EL Electro-Luminescence
  • cathode ray tube a cathode ray tube
  • PDP Plasma Display Panel
  • the image reproduction device 100 determines whether or not to display the image data in which a part of the image is lost due to the error on the monitor 190 even when an error occurs. If it is determined to be displayed, the image area missing due to the error is complemented and displayed. Since the determination at this time can be determined by the user via the input unit 170, the intention of the user can be reflected in the countermeasure when an error occurs.
  • FIG. 2 is an operation conceptual diagram of the image reproduction device 100 according to the first embodiment when no error occurs.
  • the user gives an instruction for extension operation (extension instruction) from the input unit 170.
  • the control unit 160 notifies the reproduction unit 110 of a reproduction instruction for starting to read compressed data from the recording medium 200.
  • the playback unit 110 reads the compressed data instructed by the control unit 160 (compressed data obtained by compressing “image data 0”) from the recording medium 200. Reading from the recording medium 200 is performed in a minimum reading unit, that is, a sector unit, and compressed data is transferred from the recording medium 200 to the data buffer management unit 120.
  • the data buffer management unit 120 manages the compressed data in units of sectors with two banks (that is, the sector buffer 121 and the sector buffer 122), and first compresses the first sector (sector 0) into the bank 1 (sector buffer 121). Store the data.
  • the playback unit 110 notifies the control unit 160 that the storage of the compressed data in units of sectors is completed by interrupt processing.
  • the control unit 160 confirms the presence / absence of a transfer error for the sector by a notification from the transfer error management unit 151. When there is no transfer error, the control unit 160 instructs the decompression unit 130 to decompress the compressed data of the sector. The decompression unit 130 decompresses the compressed data of the designated sector in accordance with the decompression instruction from the control unit 160. The expanded image data is stored in the storage unit 140 as needed.
  • the compressed data of the next sector (sector 1) read out by the reproducing unit 110 is stored in the sector buffer 122 (in this case, bank 2) different from the previous one to prevent overwriting of the compressed data.
  • the control unit 160 instructs the expansion unit 130 to expand the next bank.
  • the control unit 160 instructs the display processing unit 180 to start displaying image data (display instruction).
  • the display processing unit 180 outputs the image data according to the display timing of the monitor 190 and causes the monitor 190 to display it.
  • the image reproduction device 100 reads image data compressed in units of sectors from the recording medium 200. Then, the image reproduction device 100 expands the read compressed data, and causes the monitor 190 to display the image data generated by the expansion.
  • FIG. 3 is a conceptual diagram of the operation of the image reproduction device 100 according to the first embodiment in the case where image data partially missing when a transfer error occurs is not displayed. In the example shown in FIG. 3, it is assumed that a transfer error occurs during transfer of the compressed data of sector 2.
  • the user sets the number of retries (specified number of times) when an error occurs (twice in the example of FIG. 3) and the setting of non-display of image data when an error occurs.
  • the operation until the transfer error occurs is the same as in the normal operation shown in FIG.
  • the transfer error management unit 151 When the transfer error management unit 151 detects a transfer error in the compressed data transferred by the playback unit 110, the transfer error management unit 151 notifies the control unit 160 that a transfer error has occurred ("sector 2 transfer error" shown in FIG. 3). At this time, the transfer error management unit 151 counts the number of transfer errors, compares the counted number of transfer errors with the specified number, and notifies the control unit 160 of the comparison result.
  • control unit 160 If the number of transfer errors does not exceed the specified number of times, the control unit 160 reads out from the recording medium 200 the compressed data of the same sector, that is, the sector where the transfer error has occurred (sector 2 in this case). Instruct (retry processing). If the number of transfer errors exceeds the specified number, the control unit 160 stops the processing of the sector in which the transfer error has occurred, and creates non-expandable display image data that displays that the expansion is impossible.
  • the control unit 160 stores the created non-expandable display image data in the storage unit 140 and instructs the display processing unit 180 to display the image data.
  • the display processing unit 180 reads out the non-expandable display image data from the storage unit 140 according to the display instruction, and displays it on the monitor 190.
  • the image reproduction apparatus 100 cannot decompress when a transfer error occurs and the number of transfer errors that has occurred exceeds the threshold value (specified number).
  • Display image data is displayed on the monitor 190. That is, for example, a message such as “An error has occurred” or “An image cannot be displayed because an error has occurred during data reading” is displayed on the monitor 190.
  • FIG. 4 is an operation conceptual diagram of the image reproducing device 100 according to the first embodiment in the case where partially missing image data is displayed when a transfer error occurs.
  • the compressed data includes an RST marker.
  • the user sets the number of retries (specified number of times) when an error occurs (once in the example of FIG. 4) and the setting of image data display when an error occurs.
  • the operation until the number of transfer errors exceeds the specified number is the same as the operation shown in FIG.
  • the decompression unit 130 decompresses compressed data including a sector (sector 2) in which a transfer error has occurred. That is, the decompression unit 130 decompresses the compressed data of all sectors regardless of whether or not a transfer error is detected.
  • the control unit 160 starts from the compressed data (sector 3 in the example of FIG. 4) where the RST marker is inserted after the point where the code error has occurred.
  • the expansion unit 130 is instructed to perform the expansion operation.
  • control unit 160 Upon completion of expansion, the control unit 160 instructs the display processing unit 180 to start display (display instruction).
  • the display processing unit 180 reads out partially missing image data from the storage unit 140 and displays it on the monitor 190.
  • the image reproducing apparatus 100 performs a partial process when a transfer error occurs and the transfer error count that is the number of transfer errors that has occurred exceeds a threshold value (specified count). Is displayed on the monitor 190. At this time, as will be described later, the missing image region is complemented by predetermined complement image data by the control unit 160.
  • the decompression operation reliably returns in units of the RST marker, so that the reproducibility of the image data becomes higher.
  • the restoration process of the error data expansion operation by the RST marker is also described in Patent Document 2 and the like, and is well known, so the explanation is omitted.
  • control unit 160 notifies the display processing unit 180 of a display instruction when a code error is detected.
  • FIG. 5 is an operation conceptual diagram of the image reproducing device 100 according to the first embodiment when a transfer error occurs during reading of the APP marker.
  • the APP marker is data that is arbitrarily added to the compressed data defined in the JPEG standard. Therefore, even if the APP marker cannot be correctly expanded, the image data of the main body is not affected.
  • the expansion operation has already been started, the APP marker is included up to sector a + n, and the image data of the main body is included after sector b. Therefore, the expansion unit 130 outputs image data (expansion data) to the storage unit 140 after sector b in order to skip the APP marker.
  • the control unit 160 does not stop the decompression operation.
  • the expansion unit 130 performs the expansion operation.
  • control unit 160 may generate image data or character data indicating that a transfer error has occurred in order to notify the user that a transfer error has occurred.
  • the generated image data or character data is output to the monitor 190 via the display processing unit 180, and the monitor 190 displays image data or character data indicating that a transfer error has occurred. For example, a message such as “A transfer error has occurred” is displayed on the monitor 190.
  • the image reproduction device 100 does not stop the decompression operation even when a transfer error occurs while reading the APP marker, and the compressed data after the APP marker ends. That is, the unit compressed data after the unit compressed data not included in the APP marker is expanded.
  • the decompression process can be performed if there is no error in the image data body by not stopping the decompression due to the transfer error of the compressed data attached information such as the APP marker.
  • the image reproduction apparatus 100 according to the first embodiment continues the expansion operation not only for the APP marker but also when a transfer error occurs during reading of auxiliary information other than the image data main body.
  • FIG. 6 is an operation conceptual diagram of the image reproducing device 100 according to the first embodiment when decompressing incomplete compressed data (hereinafter referred to as partial compressed data) due to the interruption of the compression processing.
  • specific data hereinafter, specific code
  • the user gives an instruction to decompress by permitting the reproduction of partially compressed data in which specific data is embedded in a part of the compressed data at the input unit 170.
  • the control unit 160 sets a specific code in the expansion unit 130, and when the expansion unit 130 detects the specific code, the expansion unit 130 stops the expansion operation. Then, instead of decompressing the remaining data, for example, specific image data such as black or blue is output following the already decompressed decompressed data.
  • a specific code exists in sector 2, and the decompression unit 130 writes specific image data in the storage unit 140 after detecting the specific code.
  • the decompression unit 130 outputs a decompression completion interrupt to the control unit 160 when it finishes writing specific image data for the size of the image data that should originally exist in the storage unit 140.
  • the control unit 160 instructs the display processing unit 180 to display the partially missing image data.
  • FIG. 7 is a conceptual diagram of a partial compression data complementing process when expanding a moving image.
  • the moving image is the image data 300 for one frame of normally compressed image data and the image data of the next frame of the image data 300, and includes image data 310 including specific data (specific code). Including.
  • image data 300 is normally expanded.
  • the specific code is, for example, code data for designating specific image data.
  • neighboring frames are often similar, and therefore information on neighboring frames is used to improve the reproducibility of image data.
  • information on neighboring frames can be used for those having a high correlation between the previous captured image and the current captured image.
  • the frame in which an error is detected is not displayed, and the previous frame is continuously displayed or blacked out.
  • the image region 311 described as “specific color” in FIG. 7 is filled with specific image data created at the time of compression. Thereby, although a part of image is missing, the change of the image can be confirmed even a little.
  • the control unit 160 displays the immediately preceding image data. From 300, virtual image data 320 corresponding to the image data 310 is created.
  • the example shown in FIG. 7 is a moving image taken from a train running on the track, and the frame 301 of the image data 300 is an area corresponding to the next frame (image data 310), so that the inside of the frame is enlarged.
  • virtual image data 320 is created.
  • the frame 301 is determined by using, for example, angle of view information at the time of shooting, a frame rate of a moving image, train speed information, or GPS (Global Positioning System) information.
  • angle of view information at the time of shooting a frame rate of a moving image
  • train speed information a frame rate of a moving image
  • GPS Global Positioning System
  • the data of the same image position of the virtual image data 320 (the frame 321 indicated by the dotted line in FIG. 7) is inserted into the missing portion (the image region 311 in FIG. 7) configured by the specific data of the image data 310. Complement. Thereby, the image data 330 having higher reproducibility than the image data 310 can be obtained.
  • FIG. 8 is a conceptual diagram of the complementing process when an error occurs in the compressed data in which the RST marker is inserted.
  • the image data 400 is an example in which image data expanded excluding the area where an error has occurred, that is, partially expanded image data is displayed on the monitor 190. Although some areas of the image data are missing due to an error, if there is an RST marker, normal extension from the next RST marker in which an error has occurred can be performed. The image data has been restored.
  • the image data 410 is image data obtained as a result of complementing the image data 400 with other image data as in FIG.
  • the missing area may be complemented from the image data around the missing area instead of complementing with other image data.
  • FIG. 9 is a flowchart showing the decompression process of the image reproduction apparatus 100 according to the first embodiment.
  • the control unit 160 When the decompression process is started based on the decompression instruction input from the input unit 170, the control unit 160 notifies the reproduction unit 110 of a reproduction instruction for performing the compressed data transfer process from the recording medium 200. Thereby, the reproducing unit 110 reads out the compressed data from the recording medium 200 in units of sectors (S101). The read compressed data is stored in one of the sector buffers 121 and 122 by the data buffer management unit 120.
  • the transfer error management unit 151 checks whether or not a transfer error has occurred in the read compressed data (S102). If the transfer error management unit 151 does not detect a transfer error (NO in S102), the control unit 160 instructs the decompression unit 130 to decompress the compressed data in the sector buffer 121 or 122 (notifies the decompression instruction). .
  • the decompressing unit 130 reads the compressed data from the sector buffer 121 or 122, and starts decompressing the read compressed data (S103).
  • the code error management unit 152 checks whether there is a code error in the code of the compressed data (S104). When the code error is not detected (NO in S104), the control unit 160 detects whether or not the decompression process of the decompressed compression data is completed (S105). If the expansion process is not completed (NO in S105), the compressed data of the subsequent sector is read from the recording medium 200 (return to S101).
  • the decompression process is completed.
  • the decompressed data generated by the decompressing unit 130 decompressing the compressed data is stored in the storage unit 140.
  • the display processing unit 180 reads the decompressed data from the storage unit 140 and causes the monitor 190 to display it.
  • the transfer error management unit 151 detects a transfer error (YES in S102)
  • the image reproduction device 100 performs a transfer error process (S107).
  • S107 a transfer error process
  • FIG. 10 is a flowchart showing the transfer error process (S107 in FIG. 9) of the image reproduction apparatus 100 according to the first embodiment.
  • the transfer error process is a process performed by the image reproduction device 100 when a transfer error occurs, and is the process described with reference to FIGS. 3 to 5, for example.
  • the transfer error management unit 151 counts the number of transfer errors (S201).
  • the transfer error management unit 151 determines whether or not a threshold value for the number of transfer errors is set (S202). That is, in the transfer error management unit 151, the input unit 170 acquires a user instruction indicating a threshold value for the number of transfer errors, and is set as a threshold value (specified number) for the transfer error number by the control unit 160 based on the user instruction. It is determined whether or not.
  • the transfer error management unit 151 compares the specific number with the count number of the previous transfer error number (S203). The comparison result is notified to the control unit 160.
  • the specific number of times is a predetermined default threshold value.
  • the transfer error management unit 151 compares the specified number of times with the count of the number of transfer errors (S204). The comparison result is notified to the control unit 160.
  • control unit 160 determines whether or not to perform retransfer processing (re-execution of transfer processing from the recording medium 200, that is, retry processing) from the comparison result (S205). Specifically, the control unit 160 determines whether or not the count number of transfer errors exceeds a specific number or a specified number, and if it exceeds, determines that the retransfer process is not performed. The control unit 160 determines that the retransfer process is performed when the count number is equal to or less than the specific number or the specified number.
  • the image reproduction device 100 If it is determined that the retry process (retransfer process) is not performed based on the result of the transfer error process (S107) (NO in S108), the image reproduction device 100 performs an error image display process (S113). Details of the error image display processing will be described later with reference to FIG.
  • the control unit 160 determines whether or not the access frequency to the recording medium 200 can be lowered (S109). When the access frequency is lowered (YES in S109), the control unit 160 instructs the playback unit 110 to lower the access frequency to the recording medium 200 and perform a retransfer process. The access frequency is lowered according to the instruction (S110). The reproducing unit 110 reads the compressed data of the same sector from the recording medium 200 by accessing the recording medium 200 again with the lowered access frequency (S111).
  • the control unit 160 If the access frequency cannot be lowered (NO in S109), the control unit 160 notifies the reproduction unit 110 of the same sector re-transfer processing instruction, and the reproduction unit 110 accesses the recording medium 200 again at the same access frequency. Thus, the compressed data of the same sector is read from the recording medium 200 (S111).
  • the transfer error management unit 151 determines whether or not a transfer error has occurred in the read compressed data (S102), and the image reproduction device 100 repeats the above processing.
  • the code error management unit 152 detects a code error (YES in S104)
  • the image reproduction device 100 performs code error processing (S112).
  • code error processing S112
  • FIG. 11 is a flowchart showing the code error processing (S112 in FIG. 9) of the image reproduction apparatus 100 according to the first embodiment.
  • the code error processing is processing performed by the image reproduction device 100 when a code error occurs.
  • the control unit 160 determines whether or not detection of specific data embedded in the Huffman code area of the compressed data is set (S301). If the setting is to detect specific data (YES in S301), the control unit 160 sets the output of the specific image data to the decompression unit 130, and the image data corresponding to the remaining image data is, for example, black or gray Such specific color image data is output (S302).
  • the code error processing is completed when the output of the image data for the image data size (one frame) has been completed.
  • control unit 160 determines whether or not the continuation of the decompression process is set (S303). If the continuation of the decompression process is not set (NO in S303), the image reproduction device 100 completes the code error process.
  • the decompression unit 130 detects whether or not an RST marker is inserted in the compressed data (S304). If the RST marker has been inserted (YES in S304), the control unit 160 sets the decompression unit 130 to skip the compressed data until the next RST marker (S305). The decompressing unit 130 does not perform the decompressing operation until the next RST marker is detected from the compressed data stored in the sector buffer 121 or 122 by the reproducing unit 110.
  • control unit 160 determines whether or not the decompression unit 130 can perform the Huffman decoding process (S306).
  • the playback unit 110 performs a transfer process from the recording medium 200 in order to read the compressed data of the next sector (S307).
  • the image reproduction device 100 repeats the processing from the transfer error determination processing (S102 in FIG. 9).
  • the image reproduction device 100 completes the code error process and performs an error image display process (S113 in FIG. 9).
  • S113 in FIG. 9 details of the error image display process will be described with reference to FIG.
  • FIG. 12 is a flowchart showing the error image display process (S113 in FIG. 9) of the image reproduction apparatus 100 according to the first embodiment.
  • the error image display process is an image display process when an error such as a transfer error or a code error occurs.
  • the control unit 160 determines whether or not the compressed data in which an error has occurred is set to be displayed on the monitor 190 (S401).
  • the control unit 160 displays the image data decompressed until the error has occurred.
  • the display processing unit 180 is set to output the image data stored in the storage unit 140 to the monitor 190 (S402).
  • the image reproduction device 100 completes the error image display process and performs a complement process (S114 in FIG. 9).
  • the control unit 160 stores error display image data (for example, “this file” in the storage unit 140).
  • Image data for displaying characters such as “cannot be reproduced” is generated, and the display processing unit 180 is set to output the error display image data stored in the storage unit 140 to the monitor 190 (S403).
  • the image reproduction device 100 completes the error image display process and performs a complement process (S114 in FIG. 9). Note that the display processing unit 180 outputs error image data or error display image data in accordance with the display timing of the monitor 190.
  • FIG. 13 is a flowchart showing the complementing process (S114 in FIG. 9) of the image reproduction device 100 of the first embodiment.
  • the complementing process is a process of complementing image data that has been lost due to an error.
  • control unit 160 determines whether or not a complementing process is set (S501). When the complementing process is not set (NO in S501), the control unit 160 determines whether or not the missing image area filling process is set (S502). When the fill process is not set (NO in S502), the image reproduction device 100 completes the complement process.
  • the control unit 160 fills the image area lacking the image data stored in the storage unit 140 with image data such as black, gray, and yellow (S503).
  • An image generated by the filling process corresponds to, for example, the image data 420 in FIG.
  • the image reproduction device 100 completes the complementing process.
  • the control unit 160 determines whether or not the complement process using the image data in the same image data is set (S504). If the setting is to perform complementation within the same image data (YES in S504), the control unit 160 generates image data of the missing image region from the peripheral images of the missing image region, thereby missing the image. Data complementation is performed (S505). Then, the image reproduction device 100 completes the complementing process.
  • the control unit 160 determines whether or not other image data can be used (S506). Specifically, the control unit 160 determines whether other compressed data or image data other than the compressed data in which an error has occurred is stored in the recording medium 200 or the storage unit 140.
  • the other image data is image data similar to the image data in which an error has occurred, such as an image before or after one frame, or an image continuously shot at the same place and time.
  • control unit 160 If there is no other image data (NO in S506), the control unit 160 notifies that there is no other image data to be complemented (S507). Specifically, the control unit 160 creates displayless image data without a file in the storage unit 140 (for example, image data for displaying characters such as “There is no other file and cannot be complemented”), and the display processing unit In 180, the displayless image data stored in the storage unit 140 is set to be output to the monitor 190. Then, the image reproduction device 100 completes the complementing process.
  • the control unit 160 creates displayless image data without a file in the storage unit 140 (for example, image data for displaying characters such as “There is no other file and cannot be complemented”), and the display processing unit In 180, the displayless image data stored in the storage unit 140 is set to be output to the monitor 190. Then, the image reproduction device 100 completes the complementing process.
  • the missing image area may be filled with single-color image data instead of displaying the no-file display image data.
  • the control unit 160 When there is other image data (YES in S506), the control unit 160 generates image data of the missing image region from the image data of the portion corresponding to the missing image region of the other image data.
  • the missing image data is complemented (S508).
  • the image generated by this complementation corresponds to, for example, the image data 410 in FIG. Then, the image reproduction device 100 completes the complementing process.
  • the image reproducing device 100 performs the recording medium determination process (S115).
  • the recording medium determination process S115.
  • FIG. 14 is a flowchart showing a recording medium determination process of the image reproduction apparatus 100 according to the first embodiment.
  • the recording medium determination process is a process for determining whether the recording medium 200 on which the compressed data to be read is recorded is good or bad.
  • the control unit 160 determines whether there is an error in another sector in the same compressed data (compressed data indicating the same frame) (S601). When there is no error in another sector in the same compressed data (NO in S601), the control unit 160 determines whether there is an error in other compressed data (compressed data indicating another frame) on the same recording medium 200. Determination is made (S602). If there is no error in other compressed data in the same recording medium 200 (NO in S602), the control unit 160 determines that the recording medium 200 is normal, and the image reproducing device 100 completes the recording medium determination process. To do.
  • the recording medium 200 is defective. Is displayed on the monitor 190 (S603).
  • the control unit 160 creates recording medium error display image data (for example, image data for displaying characters such as “This memory card is broken and cannot be reproduced”) in the storage unit 140, and performs display processing.
  • the unit 180 is set to output the recording medium error display image data stored in the storage unit 140 to the monitor 190. Then, the image reproduction device 100 completes the recording medium determination process. When the recording medium determination process (S115) is completed, the image reproduction device 100 completes the expansion process.
  • the image reproduction device 100 determines whether or not an error has occurred in the read compressed image data, and responds to the error according to the type and number of errors that have occurred. To change.
  • the image reproducing apparatus 100 determines whether or not to display image data when an error occurs, the image data partially missing due to the error is displayed on the monitor 190 even when an error occurs. Can be displayed.
  • retransfer from the recording medium 200 can be performed.
  • the user can set whether or not to perform retransfer at this time, the number of times, and the like via the input unit 170.
  • the image reproducing apparatus 100 according to Embodiment 1 can flexibly process the obtained decompressed data when an error occurs.
  • the image recording apparatus compares the frame rate when capturing moving image data (capture frame rate) with the frame rate when compressing captured moving image data (compressed frame rate). As a result of comparison, when the capture frame rate is faster than the compression frame rate, the compression process for one frame is interrupted halfway, and the data is partially compressed normally by embedding specific data in the Huffman code area. And compressed data including specific data is recorded on a recording medium.
  • the configuration of the image recording apparatus according to the second embodiment will be described with reference to FIG.
  • FIG. 15 is a block diagram illustrating an example of the configuration of the image recording apparatus 500 according to the second embodiment.
  • the image recording apparatus 500 includes a recording unit 510, a data buffer management unit 520, a compression unit 530, a storage unit 540, a control unit 560, an input unit 570, and an image processing unit 580. , Sensor 590.
  • the image recording apparatus 500 compresses the image data acquired by the sensor 590 and records the compressed image data on a recording medium 600 such as an SD card or HDD.
  • the sensor 590 is an image sensor such as a CCD (Charge Coupled Device) or CMOS (Complementary Metal Oxide Semiconductor).
  • the sensor 590 acquires RAW data by imaging a subject.
  • the RAW data is, for example, RGB data.
  • the storage unit 540 is a memory that stores the image data converted by the image processing unit 580.
  • the image processing unit 580 converts the RAW data acquired by the sensor 590 into image data and stores the image data in the storage unit 540.
  • the image data is image data composed of luminance information (Y) and color difference information (Cb, Cr).
  • the compression unit 530 reads the image data from the storage unit 540 and compresses the read image data based on the JPEG standard. Compressed data that is compressed image data is output to the data buffer management unit 520.
  • the compression unit 530 includes a specific data generation unit 531.
  • the specific data generation unit 531 adds the specific data determined by the control unit 560 to the compressed data when the control unit 560 is instructed to stop the compression process.
  • the compression unit 530 outputs the compressed data including the normally compressed data and the specific data to the data buffer management unit 520.
  • the data buffer management unit 520 includes a data buffer 521, and stores the compressed data output from the compression unit 530 in the data buffer 521 in the minimum reading unit of the recording medium 600.
  • FIG. 15 shows a configuration in which the data buffer management unit 520 includes one data buffer 521, but the data buffer management unit 520 may include one or more data buffers.
  • the recording unit 510 writes the compressed data from the data buffer management unit 520 to the recording medium 600.
  • the control unit 560 controls processing of the entire image recording apparatus 500 by notifying each processing unit included in the image recording apparatus 500 of an instruction. For example, the control unit 560 notifies each processing unit of the user instruction acquired by the input unit 570.
  • the control unit 560 captures the raw frame rate when the image processing unit 580 captures the RAW data from the sensor 590, converts it to image data, and stores it in the storage unit 540, and the compression unit 530 captures the image data from the storage unit 540.
  • the compressed frame rate when reading and compressing is compared.
  • the control unit 560 determines that the compression process is not in time, and notifies the compression unit 530 of a compression stop instruction.
  • the control unit 560 determines that the compression process is not in time when two or more compression instructions are input from the input unit 570 during the compression process of one frame.
  • the input unit 570 is a user interface that acquires a user instruction from a user and transmits the acquired user instruction to the control unit 560.
  • the input unit 570 obtains from the user a compression instruction that indicates the start of a series of processes from data acquisition by the image recording apparatus 500 to compression and recording on the recording medium 600.
  • the image recording apparatus 500 compares the capture frame rate with the compression frame rate, and when the capture frame rate is faster than the compression frame rate, stops the compression process for one frame.
  • the specific data is embedded in the Huffman code area.
  • FIG. 16 is an operation conceptual diagram of the image recording apparatus 500 of the second embodiment.
  • the user gives a compression instruction from the input unit 570, and the control unit 560 transmits a shooting instruction to start exposure to the sensor 590.
  • the control unit 560 transmits a capture instruction to the sensor 590 and the image processing unit 580 in order to capture the RAW data into the storage unit 540.
  • RAW data is output from the sensor 590, and the image processing unit 580 converts the RAW data into image data including luminance information and color difference information, and stores the converted image data in the storage unit 540.
  • the compression unit 530 compresses the image data stored in the storage unit 540, and stores the compressed image data in the data buffer 521 in the data buffer management unit 520.
  • the recording unit 510 reads the compressed data stored in the data buffer 521 and records it on the recording medium 600.
  • the capture frame rate when capturing data from the sensor 590 (interval from the shooting instruction in FIG. 16 to the next shooting instruction) and the compression frame rate of compression processing (1 of the compression unit 530 in FIG. 16).
  • the capture frame rate from the sensor 590 is faster. For this reason, the compression unit 530 cannot perform processing in real time.
  • the consistency between the capture process and the compression process is achieved by skipping the frames processed by the compression unit 530. That is, since the compression processing of the image data for one frame is skipped, the image data for one frame is not recorded.
  • the compression unit 530 performs compression processing as much as possible in order to leave as much information of all the frames as possible.
  • the control unit 560 receives an input from the input unit 570 while the compression unit 530 is compressing one frame of image data. If only one compression instruction is performed, it is determined that the compression process is in time. On the contrary, when the input unit 570 acquires a plurality of compression instructions during the compression process of one frame of image data, the control unit 560 determines that the compression process is delayed, and stops the compression process at that time.
  • the control unit 560 stops the compression operation by notifying the compression unit 530 of a compression stop instruction, and takes the consistency of the real-time processing.
  • the compression unit 530 cancels the compression process, adds the specific data predetermined by the control unit 560 to the data buffer management unit 520 after the compressed data generated halfway.
  • the recording unit 510 records partially compressed data including specific data on the recording medium 600.
  • FIG. 17 is a flowchart illustrating compression processing of the image recording apparatus 500 according to the second embodiment.
  • the image recording apparatus 500 starts the compression process based on the compression instruction input from the input unit 570.
  • the sensor 590 acquires RAW data under the control of the control unit 560, and the image processing unit 580 converts the RAW data into image data and stores it in the storage unit 540.
  • the compression unit 530 compresses the image data stored in the storage unit 540, and the recording unit 510 records the compressed data on the recording medium 600.
  • the control unit 560 compares the captured frame rate with the compressed frame rate (S701). If the capture frame rate is faster (YES in S701), the control unit 560 notifies the compression unit 530 of an instruction to interrupt the compression process. At this time, the control unit 560 performs embedding setting of specific data in the compression unit 530.
  • the compression unit 530 embeds specific data determined by the control unit 560 following the compressed data that has been normally compressed (S702).
  • the control unit 560 determines completion of the compression process (S703).
  • the completion of the compression process by the compression unit 530 is confirmed (YES in S703), the image recording apparatus 500 completes the compression process.
  • the image recording apparatus 500 compares the captured frame rate with the compressed frame rate. If the captured frame rate is faster than the compressed frame rate, the image recording apparatus 500 stops the compression process for one frame. Embed specific data. Thereby, compared with the case where image data for one frame is not compressed and recorded in the related art, the image data can be compressed and recorded even if it is a part.
  • the present invention may be an imaging device that combines the above-described image reproduction device 100 and the image recording device 500.
  • FIG. 18 is a block diagram illustrating an example of a different configuration of the image reproduction device according to the embodiment of the present invention.
  • FIGS. 1 and 15 includes a playback unit 110, an expansion unit 130, an error management unit 150, a display processing unit 180, a monitor 190, a recording unit 510, a compression unit 530, and an image processing unit 580.
  • the same components as those in FIGS. 1 and 15 are denoted by the same reference numerals.
  • the image reproduction device 700 is an imaging device such as a digital camera, for example, and compresses the image data acquired by the sensor 590 and records it on the recording medium 800. Further, the compressed data is read from the recording medium 800, the read compressed data is expanded, and the obtained image data is displayed on the monitor 190.
  • the data buffer management unit 720 performs processing of both the data buffer management units 120 and 520. As shown in FIG. 18, as an example, the data buffer management unit 720 includes sector buffers 721 and 722. The sector buffers 721 and 722 correspond to the sector buffers 121 and 122, the data buffer 521, and the like.
  • the storage unit 740 corresponds to the storage units 140 and 540. Note that the storage unit 740 may be physically two memories, or may be physically one memory that is logically divided into regions.
  • the control unit 760 corresponds to the control units 160 and 560, and controls the processing of the entire image reproduction device 700 by performing both processing.
  • the input unit 770 corresponds to the input units 170 and 570, and performs both processes.
  • the image reproducing device 700 may have the functions of the image reproducing device 100 and the image recording device 500 together.
  • the buffer capacity of the data buffer management unit 120 is described as two. However, the present invention is not limited to this, and three or more data buffers may be provided.
  • a data buffer capable of absorbing the speed difference in order to conceal the processing waiting time by the playback unit 110 or the decompression unit 130. It is better to have
  • the data buffer management unit 120 first stores data in the bank 1 (sector buffer 121).
  • the data is not limited to this, and may be stored in the bank 2 (sector buffer 122). .
  • the decompressed image data when it does not have an image data size that can be displayed on the monitor 190, it can be displayed on the monitor 190 by at least one of the decompression unit 130, the display processing unit 180, or the control unit 160.
  • the image data size may be resized.
  • image data that cannot be decompressed is created when an error occurs. However, it may be created in advance. Further, when there is a margin in the memory space of the storage unit 140, it is not necessary to create each time by holding the non-expandable display image data created once.
  • the occurrence of an error in the data in the APP marker is performed after the display of the image data.
  • the display is performed in advance and the user is allowed to select whether to display the image data. Also good.
  • all the compressed data is input to the decompression unit 130.
  • the sector b and after may be input.
  • the decompressing unit 130 skips the data and performs the decompressing operation from the data after the APP marker.
  • the missing area of the image data is complemented by enlarging the previous frame, but the next frame is estimated from subject motion prediction and the angular velocity sensor of the camera. You may make a prediction.
  • the data buffer management unit 120 is provided to perform reading from the recording medium 200 and expansion by the expansion unit 130 at the same time.
  • the reproduction unit 110 is transferred from the recording medium 200 to the storage unit 140.
  • the compressed data may be transferred, and the decompression unit 130 may read the decompressed data from the storage unit 140 and decompress the compressed data.
  • RAW data is described as data captured from the sensor 590.
  • the present invention is not limited to this, and the image recording apparatus 500 acquires image data, and the compression unit 530 acquires the acquired image data. You may compress. Further, if necessary, the data may be compressed after conversion such as resizing.
  • FF FF
  • Y, Cb, and Cr data 10 pieces of “FF” are specified as specific data, and then Y, Cb, and Cr data are specified.
  • the number of FFs, FF, Y, and Cb are not limited thereto.
  • the order of Cr may be changed.
  • “FFD9” indicating the end of the image may be inserted at the error location and the specific data may be embedded thereafter.
  • the image reproduction device 100 may not include the monitor 190.
  • the display processing unit 180 may display the compressed data stored in the storage unit 140 on a display device such as an external display.
  • the control unit 160 determines whether or not to output the decompressed data when an error (transfer error or code error) is detected by the error management unit 150.
  • the control unit 160 complements the supplemental image data in the same manner as in the first embodiment.
  • the display processing unit 180 outputs decompressed data including complementary image data.
  • the image recording apparatus 500 may not include the sensor 590.
  • the image processing unit 580 may store image data input from the outside in the storage unit 740.
  • the present invention can be realized not only as an image reproducing apparatus and an image reproducing method, but also as a program for causing a computer to execute the image reproducing method of the present embodiment. Further, it may be realized as a recording medium such as a computer-readable CD-ROM (Compact Disc-Read Only Memory) for recording the program. Furthermore, it may be realized as information, data, or a signal indicating the program. These programs, information, data, and signals may be distributed via a communication network such as the Internet.
  • a communication network such as the Internet.
  • the constituent elements constituting the image reproducing apparatus may be configured by one system LSI (Large Scale Integration).
  • the system LSI is an ultra-multifunctional LSI manufactured by integrating a plurality of components on a single chip.
  • the system LSI is a computer system including a microprocessor, a ROM, a RAM, and the like. .
  • the reproduction unit 110, the data buffer management unit 120, the decompression unit 130, the error management unit 150, and the control unit 160 are configured as one system LSI.
  • the image reproduction apparatus and the image reproduction method of the present invention have an effect that the expanded data obtained when an error occurs can be flexibly processed, and can be used for a digital camera or the like.

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Abstract

L'invention porte sur un appareil de reproduction d'image commandant le traitement des données d'image obtenues lorsqu'une erreur s'est produite, afin de traiter ainsi l'erreur. L'appareil de reproduction d'image (100) développe des données compressées et émet le résultat. L'appareil de reproduction d'image (100) comporte : une unité de reproduction (110) lisant des données compressées à partir d'un support d'enregistrement (200) en tant que données compressées unitaires pour chaque unité prédéterminée de traitement ; une unité de développement (130) générant des données de développement unitaires par expansion des données compressées unitaires ; une unité de traitement d'affichage (180) délivrant les données développées comprenant les données développées unitaires ; une unité de gestion d'erreur (150) détectant les erreurs se produisant dans l'unité de reproduction (110) ou l'unité de développement (130) pour chaque donnée compressée unitaire ; et une unité de commande (160) déterminant s'il faut ou non délivrer les données développées dans le cas où une erreur a été détectée. Lorsqu'il est déterminé que les données développées doivent être émises, l'unité de commande (160) utilise des données d'image supplémentaires pour compléter les données développées unitaires correspondant aux données compressées unitaires dans lesquelles une erreur a été détectée, et l'unité de traitement d'affichage (180) délivre les données développées comprenant les données d'image supplémentaires.
PCT/JP2009/006669 2009-04-22 2009-12-07 Appareil de reproduction d'image et procédé de reproduction d'image WO2010122620A1 (fr)

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JP2009-104477 2009-04-22

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